公开(公告)号：EP1280027A4

公开(公告)日：2004-09-15

申请号：EP01912414

申请日：2001-03-15

申请人： DIGITAL ELECTRONICS CORP

发明人： KEGOYA KENTARO ,  YOSHIDA MINORU ,  TANIGAWA SHUNU ,  KATO SATOSHI ,  YAGI NOBUHIRO ,  SAITO MASAO ,  YAMADA MASAAKI

IPC分类号： G05B19/042 ,  G05B19/05

CPC分类号： G05B19/042 ,  G05B19/05 ,  G05B2219/2206 ,  G05B2219/24084 ,  G05B2219/31161 ,  G05B2219/31186 ,  G05B2219/31457

摘要： Screen data created by an image processor (74) of a control host computer (7) is transmitted to a programmable display device (5). Based on the screen data, the programmable display device (5) queries a PLC (3) about the state of a device (21) to update display and transmit control instructions according to an input result. An applet that a compiler (76) produces by compiling the screen data is transmitted to a client device (9) through the Internet (32) by an open server (77) of the control host computer (7). The client device (9) executes the applet, sends the open server (77) an inquiry and control instructions similar to those from the programmable display device (5), and updates a display according to a response. A control system is realized for remotely checking the display contents of the programmable display device (5) without redrawing.